These were: the  Orange Free State, centered around the Orange River, and the Transvaal Republic, beyond the  River Vaal.

这些是：奥兰治河为中心的奥兰治自，及位于瓦尔河远的德兰士瓦共和国。

The Great Trek led the Boers to the northeastern regions of the Orange and Vaal Rivers, beyond the control of British colonial administration.

伟大的涉将布尔人带到了奥兰治河和瓦尔河的东北，不受英国殖民政府的控制。

Like European-American settlers, they set out in tented wagons to establish new settlements in the fertile northeastern regions of the Orange and Vaal Rivers.

像欧洲裔美国定居者一样，他们乘坐帐篷马车出发，在奥兰治河和瓦尔河肥沃的东北建立新的定居点。